Can I sell computer with pre-installed software with Apache 2.0 License?

It is perfectly lawful to sell a computer with free software pre-installed. Indeed, you may charge whatever you like; not just for the hardware, but for the software, too. The FSF are clear about that.

What you may not do is deliver it without user freedom, so you may not attempt to legally prevent the user from using, copying, modifying, and then redistributing the software thereon as they wish. If the software is covered by a copyleft licence, such as GPL, you must provide the user with source code to assist them in this. If the GPL is v3, you may not attempt to prevent the user exercising their freedoms by technical means (eg, DRM), either.